Chapter_12
... points object is not in equilibrium, since there is a net torque. If equal and opposite forces are applied at the same ___________ or along the same _______________ object is in equilibrium ...
... points object is not in equilibrium, since there is a net torque. If equal and opposite forces are applied at the same ___________ or along the same _______________ object is in equilibrium ...
Answer Key Physics Study Guide A
... All projectiles (thrown objects) on earth accelerate DOWN (due to gravity) What does constant velocity mean in term of acceleration and force? Constant velocity means there is zero acceleration. Zero acceleration means zero net force. c. Measure and calculate the magnitude of frictional forces and N ...
... All projectiles (thrown objects) on earth accelerate DOWN (due to gravity) What does constant velocity mean in term of acceleration and force? Constant velocity means there is zero acceleration. Zero acceleration means zero net force. c. Measure and calculate the magnitude of frictional forces and N ...
template
... Fearth man (Fg = 85kg*-10N/kg) b. What force does the floor now exert on the man? CV : Fnet-x = 0N (no forces acting in x-direction) Fnet-y= (85kg*-3.0m/s2) = -255N ...
... Fearth man (Fg = 85kg*-10N/kg) b. What force does the floor now exert on the man? CV : Fnet-x = 0N (no forces acting in x-direction) Fnet-y= (85kg*-3.0m/s2) = -255N ...
hw3
... 2. Estimate the electric field between two socks which stick together when you pull them out of the dryer. Assume that the socks are parallel plates separated by some small gap, g, with a frictioninduced charge (triboelectric effect) on each side. If the mass of a sock per unit area is 1kg/m2 a. est ...
... 2. Estimate the electric field between two socks which stick together when you pull them out of the dryer. Assume that the socks are parallel plates separated by some small gap, g, with a frictioninduced charge (triboelectric effect) on each side. If the mass of a sock per unit area is 1kg/m2 a. est ...
Weightlessness
Weightlessness, or an absence of 'weight', is an absence of stress and strain resulting from externally applied mechanical contact-forces, typically normal forces from floors, seats, beds, scales, and the like. Counterintuitively, a uniform gravitational field does not by itself cause stress or strain, and a body in free fall in such an environment experiences no g-force acceleration and feels weightless. This is also termed ""zero-g"" where the term is more correctly understood as meaning ""zero g-force.""When bodies are acted upon by non-gravitational forces, as in a centrifuge, a rotating space station, or within a space ship with rockets firing, a sensation of weight is produced, as the contact forces from the moving structure act to overcome the body's inertia. In such cases, a sensation of weight, in the sense of a state of stress can occur, even if the gravitational field was zero. In such cases, g-forces are felt, and bodies are not weightless.When the gravitational field is non-uniform, a body in free fall suffers tidal effects and is not stress-free. Near a black hole, such tidal effects can be very strong. In the case of the Earth, the effects are minor, especially on objects of relatively small dimension (such as the human body or a spacecraft) and the overall sensation of weightlessness in these cases is preserved. This condition is known as microgravity and it prevails in orbiting spacecraft.